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  • Riche Carl ·
    I have a 2004 mazda 6 s hatchback 3.0v6, checking engine light is on the code reads p0420 I was told by a professional mechanic I need a new catalytic converter, the car doesnt run rough at all, the light has been on for a while now and it still runs smooth, any suggestions anybody before I spend the money for a new converter because they are quite expensive, oh another thing when the light first started coming on, it would only come on when on the highway doing about 70 mph but would go off driving around town but now it just stays on
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